A new class of discontinuous solar wind solutions
A new class of discontinuous solar wind solutions
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DOI：
10.1093/mnras/staa1396
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发表时间：
2020-05
影响因子：
4.8
通讯作者：
B. Shergelashvili;V. Melnik;G. Dididze;H. Fichtner;G. Brenn;S. Poedts;H. Foysi;M. Khodachenko;T. V. Zaqarashvili
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作者：
B. Shergelashvili;V. Melnik;G. Dididze;H. Fichtner;G. Brenn;S. Poedts;H. Foysi;M. Khodachenko;T. V. Zaqarashvili
在一般的多向、单流体流体力学框架内，建立了一类新的一维太阳风模型。考虑了具有局部热源的准绝热径向膨胀的特殊情况。我们考虑在整个径向域中具有连续马赫数的解析解，同时允许在流速、密度和温度上的跳跃，前提是在临界点附近存在支持这种物理量跳跃的外部能量源。这与标准的帕克太阳风模型和原始的喷嘴解决方案有本质上的区别，其中这种不连续的解决方案是不允许的。我们得到了慢风和快风控制方程的新颖样本解析解。
A new class of one-dimensional solar wind models is developed within the general polytropic, single-fluid hydrodynamic framework. The particular case of quasi-adiabatic radial expansion with a localized heating source is considered. We consider analytical solutions with continuous Mach number over the entire radial domain while allowing for jumps in the flow velocity, density, and temperature, provided that there exists an external source of energy in the vicinity of the critical point which supports such jumps in physical quantities. This is substantially distinct from both the standard Parker solar wind model and the original nozzle solutions, where such discontinuous solutions are not permissible. We obtain novel sample analytic solutions of the governing equations corresponding to both slow and fast wind.